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Time-domain model of quantum-dot semiconductor optical amplifiers for wideband optical signals

: Puris, D.; Schmidt-Langhorst, C.; Lüdge, K.; Majer, N.; Schöll, E.; Petermann, K.

Postprint (PDF; )

Optics Express 20 (2012), Nr.24, S.27265-27282
ISSN: 1094-4087
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer HHI ()

We present a novel theoretical time-domain model for a quantum dot semiconductor optical amplifier, that allows to simulate subpicosecond pulse propagation including power-based and phase-based effects. Static results including amplified spontaneous emission spectra, continuous wave amplification, and four-wave mixing experiments in addition to dynamic pump-probe simulations are presented for different injection currents. The model uses digital filters to describe the frequency dependent gain and microscopically calculated carrier-carrier scattering rates for the interband carrier dynamics. It can be used to calculate the propagation of multiple signals with different wavelengths or one wideband signal with high bitrate.